Despite the fact that antilock brakes are designed to make driving safer, research suggests that people who drive cars equipped with antilock brakes have more accidents than those who drive cars not equipped with antilock brakes.

Each of the following, if true, would help resolve the apparent discrepancy described above EXCEPT:

A. Most cars equipped with antilock brakes are, on average, driven more carelessly than cars not equipped with antilock' brakes.

B. Antilock brakes malfunction more often than regular brakes.

C. Antilock brakes require expensive specialized maintenance to be even as effective as unmaintained regular brakes.

D. Most people who drive cars equipped with antilock brakes do not know how to use those brakes properly.

E. Antilock brakes were designed for safety in congested urban driving, but accidents of the most serious nature take place on highways.

One of the most intriguing stories of the Russian Revolution concerns the identity of Anastasia, the youngest daughter of Czar Nicholas II. During his reign over Russia, the Czar had planned to revoke many of the harsh laws established by previous czars. Some workers and peasants, however, clamored for more rapid social reform. In 1918 a group of these people, known as Bolsheviks, overthrew the government. On July 17 or 18, they murdered the Czar and what was thought to be his entire family. Although witnesses vouched that all the members of the Czar's family had been executed, there were rumors suggesting that Anastasia had survived. Over the years, a number of women claimed to be Grand Duchess Anastasia. Perhaps the best 璳nown claimant was Anastasia Tschaikovsky, who was also known as Anna Anderson. In 1920, eighteen months after the Czar's execution, this terrified young woman was rescued from drowning in a Berlin river. She spent two years in a hospital, where she attempted to eclaim her health and shattered mind. The doctors and nurses thought that she resembled Anastasia and questioned her about her background. She disclaimed any connection with the Czar's family. Eight years later, though, she claimed that she was Anastasia. She said that she had been rescued by two Russian soldiers after the Czar and the rest of her family had been killed. Two brothers named Tschaikovsky had carried her into Romania. She had married one of the brothers, who had taken her to Berlin and left her there, penniless and without a vocation. Unable to invoke the aid of her mother's family in Germany, she had tried to drown herself. During the next few years, scores of the Czar's relatives, ex-servants, and acquaintances interviewed her. Many of these people said that her looks and mannerisms were evocative of the Anastasia that they had known. Her grandmother and other relatives denied that she was the real Anastasia, however. Tried of being accused of fraud, Anastasia immigrated to the United States in 1928 and took the name Anna Anderson. She still wished to prove that she was Anastasia, though, and returned to Germany in 1933 to bring suit against her mother's family. There she declaimed to the court, asserting that she was indeed Anastasia and deserved her inheritance. In 1957, the court decided that it could neither confirm nor deny Anastasia's identity. Although we will probably never know whether this woman was the Grand Duchess Anastasia, her search to establish her identity has been the subject of numerous books, plays, and movies.

Witnesses _____________ that all members of the Czar's family had been executed.

A. gave assurance

B. thought

C. hoped

D. convinced some

E. answer not stated

"Old woman," grumbled the burly white man who had just heard Sojourner Truth speak, "do you think your talk about slavery does any good? I don't care anymore for your talk than I do for the bite of a flea." The tall, imposing black woman turned her piercing eyes on him. "Perhaps not," she answered, "but I'll keep you scratching." The little incident of the 1840s sums up all that Sojourner Truth was: utterly dedicated to spreading her message, afraid of no one, forceful and witty in speech. Yet forty years earlier, who could have suspected that a spindly slave girl growing up in a damp cellar in upstate New York would become one of the most remarkable women in American history? Her name then was Isabella (many slaves had no last names), and by the time she was fourteen she had seen both parents die of cold and hunger. She herself had been sold several times. By 1827, when New York freed its slaves, she had married and borne five children. The first hint of Isabella's fighting spirit came soon after wards, when her youngest son was illegally seized and sold. She marched to the courthouse and badgered officials until her son was returned to her. In 1843, inspired by religion, she changed her name to Sojourner (meaning "one who stays briefly") Truth, and, with only pennies in her purse, set out to preach against slavery. From New England to Minnesota she trekked, gaining a reputation for her plain but powerful and moving words. Incredibly, despite being black and female (only white males were expected to be public speakers), she drew thousands to town halls, tents, and churches to hear her powerful, deep-voiced pleas on equality for blacks-and for women. Often she had to face threatening hoodlums. Once she stood before armed bullies and sang a hymn to them. Awed by her courage and her commanding presence, they sheepishly retreated.

During the Civil War she cared for homeless ex-slaves in Washington. President Lincoln invited her to the White House to bestow praise on her. Later, she petitioned Congress to help former slaves get land in the West. Even in her old age, she forced the city of Washington to integrate its trolley cars so that black and white could ride together. Shortly before her death at eighty-six, she was asked what kept her going. "I think of the great things," replied Sojourner.

This incident occurred in the

A. 1760s

B. 1900s

C. 1840s

D. 1920s

E. 1700s

The autobiographical narrative Incidents in the Life of a Slave Girl, Written by Herself (1861), by Harriet A. Jacobs, a stave of African descent, not only recounts an individual life but also provides, implicitly and explicitly, a perspective on the larger United States culture from the viewpoint of one denied access to it. Jacobs, as a woman and a slave, faced the stigmas to which those statuses were subject. Jacobs crafted her narrative, in accordance with the mainstream literary genre of the sentimental domestic novel, as an embodiment of cherished cultural values such as the desirability of marriage and the sanctity of personal identity, home, and family. She did so because she was writing to the free women of her day ?the principal readers of domestic novels ?in the hopes that they would sympathize with and come to understand her unique predicament as a female slave. By applying these conventions of the genre to her situation, Jacobs demonstrates to her readers that family and domesticity are no less prized by those forced into slavery, thus leading her free readers to perceive those values within a broader social context.

Some critics have argued that, by conforming to convention, Jacobs shortchanged her own experiences; one critic, for example, claims that in Jacobs's work the purposes of the domestic novel overshadow those of the typical slave narrative. But the relationship between the two genres is more complex: Jacobs's attempt to frame her story as a domestic novel creates a tension between the usual portrayal of women in this genre and her actual experience, often calling into question the applicability of the hierarchy of values espoused by the domestic novel to those who are in her situation. Unlike the traditional romantic episodes in domestic novels in which a man and woman meet, fall in love, encounter various obstacles but eventually marry, Jacobs's protagonist must send her lover, a slave, away in order to protect him from the wrath of her jealous master. In addition, by the end of the narrative, Jacobs's protagonist achieves her freedom by escaping to the north, but she does not achieve the domestic novel's ideal of a stable home complete with family, as the price she has had to pay for her freedom is separation from most of her family, including one of her own children. Jacobs points out that, slave women view certain events and actions from a perspective different from that of free women, and that they must make difficult choices that free women need not. Her narrative thus becomes an antidomestic novel, for Jacobs accepts readily the goals of the genre, but demonstrates that its hierarchy of values does not apply when examined from the perspective of a female slave, suggesting thereby that her experience, and that of any female slave, cannot be fully understood without shedding conventional perspectives.

According to the passage, Jacobs's narrative departs from the conventions of a typical domestic novel in which one of the following ways?

A. Jacobs's protagonist does not ultimately achieve her freedom.

B. Jacobs's protagonist does not wish for the same ideals as the protagonists of domestic novels.

C. Jacobs's protagonist does not encounter various obstacles in her quest for love.

D. Jacobs's protagonist does not ultimately achieve the ideals of home and family.

E. Jacobs's protagonist does not experience the stigmas to which women and slaves were subject.

Experts anticipate that global atmospheric concentrations of carbon dioxide (CO2) will have-doubled by the end of the twenty-first century. It is known that CO2 can contribute to global warming by trapping solar energy that is being reradiated as heat from the Earth's surface. However, some research has suggested that elevated CO2 levels could enhance the photosynthetic rates of plants, resulting in a lush world of agricultural abundance, and that this CO2 fertilization effect might eventually decrease the rate of global warming. The increased vegetation in such an environment could be counted on to draw more CO, from the atmosphere. The level of CO2 would thus increase at a lower rate than many experts have predicted.

However, while a number of recent studies confirm that plant growth would be generally enhanced in an atmosphere rich in CO2, they also suggest that increased CO2 would differentially increase the growth rate of different species of plants, which could eventually result in decreased agricultural yields. Certain important crops such as corn and sugarcane that currently have higher photosynthetic efficiencies than other plants may lose that edge in an atmosphere rich in CO2. Patterson and Flint have shown that these important crops may experience yield reductions because of the increased performance of certain weeds.

Such differences in growth rates between plant species could also alter ecosystem stability. Studies have shown that within rangeland regions, for example, a weedy grass grows much better with plentiful CO2 than do three other grasses. Because this weedy grass predisposes land to burning, its potential increase may lead to greater numbers of and more severe wildfires in future rangeland communities.

It is clear that the CO2 fertilization effect does not guarantee the lush world of agricultural abundance that once seemed likely, but what about the potential for the increased uptake of CO2 to decrease the rate of global warming? Some studies suggest that the changes accompanying global warming will not improve the ability of terrestrial ecosystems to absorb CO2. Billings' simulation of global warming conditions in wet tundra grasslands showed that the level of CO2 actually increased. Plant growth did increase under these conditions because of warmer temperatures and increased CO2 levels. But as the permafrost melted, more peat {accumulated dead plant material) began to decompose. This process in turn liberated more CO2 to the atmosphere. Billings estimated that if summer temperatures rose four degrees Celsius, the tundra would liberate 50 percent more CO2 than it does currently. In a warmer world, increased plant growth, which could absorb CO2 from the atmosphere, would not compensate for this rapid increase in decomposition rates. This observation is particularly important because high-latitude habitats such as the tundra are expected to experience the greatest temperature increase.

Which one of the following best describes the function of the last paragraph of the passage?

A. It presents research that may undermine a hypothesis presented in the first paragraph.

B. It presents solutions for a problem discussed in the first and second paragraphs.

C. It provides an additional explanation for a phenomenon described in the first paragraph.

D. It provides experimental data in support of a theory described in the preceding paragraph.

E. It raises a question that may cast doubt on information presented in the preceding paragraph.